JP2016109199A - Valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device which can suppress a wear of a pressing portion of a cam portion of a second stem, and suppress the lowering of pressing force.SOLUTION: A second stem 6 has a columnar cam portion 61 at one end portion, and a part of a peripheral surface of the columnar cam portion 61 forms a pressing portion 61a. The cam portion 61 is inserted in a recessed portion 710 of a connecting portion. While a non-penetration part of a valve body 2 is opposite to a sheet member, the second stem 6 is rotated in one direction around an axis, thereby pressing an inner surface 71 of the recessed portion 710 of the connecting portion with the pressing portion 61a of the cam portion 61. On the other hand, the second stem 6 is rotated in the other direction around the axis, thereby releasing the pressing by the pressing portion 61a, and rotations about the axis of a valve body 2 can be permitted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a valve device for opening / closing or switching a flow path for flowing a flow target such as liquid or powder.

  2. Description of the Related Art Conventionally, there are various types of valve devices for opening / closing and switching a flow path through which a flow target such as liquid or powder flows, and one of them is a rotary valve.

  As shown in FIG. 6, the valve device (rotary valve) is provided so as to be rotatable around a predetermined axis L, and a communication passage R <b> 1 penetrating through a virtual plane orthogonal to or substantially orthogonal to the axis L is formed. The valve body 500 and the valve body housing chamber VR for housing the valve body 500 are formed, and at least two main passages that can communicate with each other via the communication passage R1 of the valve body 500 in the valve body housing chamber VR. A housing 510 in which R2 and R3 are formed, an annular seat member 520 disposed around the opening of one main passage R2 that opens toward the valve body housing chamber VR in the housing 510, and an axis L. A first stem 530 that is inserted through the housing 510 and rotates around the axis L on one end side of the valve body 500 in the direction of the axis L in a state that is not in contact with the seat member 520, and passes through the axis L A second stem 540 that is inserted into the housing 510 on the opposite side to the first stem 530 and tilts the valve body 500 toward the seat member 520 on the other end side of the valve body 500 in the direction of the axis L, A connecting portion 550 is disposed between the second stem 540 and connects the valve body 500 and the second stem 540.

  The connecting portion 550 has a concave portion 551 having a square hole shape and a bottomed cylindrical shape, and one end portion of the second stem 540 is inserted into the concave portion 551. A portion of the connection portion 550 opposite to the side having the recess 551 is inserted into a connection portion insertion portion 502 formed on the other end side of the valve body 500 in the axis L direction. One end of the second stem 540 inserted into the recess 551 has a columnar cam portion 541 that is eccentric with respect to the axis L. The cam portion 541 has a pressing portion 541a that rotates around the axis L and abuts against the inner surface of the recess 551 to press the inner surface (see FIG. 7).

  In the valve device 100 having the above-described configuration, the valve body 500 is rotated around the axis L by the first stem 530, so that the communication passage R1 of the valve body 500 and the main passages R2 and R3 of the housing 510 are in communication (flow target object). ) And a state in which the non-penetrating portion of the valve body 500 and the annular seat member 520 face each other. Further, in this type of valve device 100, the pressing portion 541a of the cam portion 541 is connected to the connecting portion by rotating the second stem 540 around the axis L with the non-penetrating portion of the valve body 500 facing the seat member 520. The inner surface of the concave portion 551 of the 550 is pressed, and this pressing force is transmitted to the valve body 500 so that the valve body 500 tilts toward the seat member 520. The non-penetrating portion of the valve body 500 and the seat member 520 are in close contact with each other, and the communication between the communication passage R1 and the main passages R2 and R3 can be blocked (see, for example, Patent Document 1). .

JP 2012-237344 A

  Incidentally, the pressing portion 541a of the cam portion 541 inserted into the concave portion 551 of the connecting portion 550 is in a line contact or substantially line contact state with the inner surface of the concave portion 551 when the valve body 500 is not tilted.

  However, in this type of valve device 100, the connection portion 550 is fitted (fixed) into the connection portion insertion portion 502 without a substantial gap, so that when the valve body 500 tilts, it tilts together with the valve body 500. On the other hand, the second stem 540 inserted into the recess 551 of the connection portion 550 has a structure in which only rotation around the axis L is permitted by the housing 510, so that even if the valve body 500 or the connection portion 550 tilts. A substantially vertical posture (perpendicular to the axes of the main passages R2 and R3) is maintained. Therefore, as shown in FIG. 7, when the valve body 500 tilts, the pressing portion 541a of the cam portion 541 and the connecting portion 550 are in a point contact state or a substantially point contact state, that is, a contact area is extremely small. For this reason, a large force is locally applied to the pressing portion 541a of the cam portion 541. Accordingly, when the tilting of the valve body 500 is repeatedly performed, the pressing portion 541a is gradually worn, and the pressing force by the pressing portion 541a is reduced. As a result, a problem that the valve body 500 cannot be sufficiently pressed against the seat member 520 may occur.

  Then, this invention makes it a subject to provide the valve apparatus which can suppress the abrasion of the press part of the cam part of a 2nd stem, and can suppress the fall of pressing force.

  A valve device according to the present invention is provided so as to be rotatable about a predetermined axis, and has a valve body formed with a communication passage penetrating through a virtual plane orthogonal to or substantially orthogonal to the axis, and the valve body A housing in which a valve body housing chamber is formed and at least two main passages that can communicate with each other via a communication passage of the valve body in the valve body housing chamber are formed, and the valve body is housed in the housing An annular seat member disposed around an opening of at least one main passage that opens toward the chamber, and is inserted into the housing so as to pass through the axis, and the valve body at one end side of the valve body in the axial direction A first stem that rotates about the axis, and is inserted into the housing on the opposite side of the first stem so as to pass through the axis, and the valve body is inserted at the other end of the valve body in the axial direction. A second stem that tilts toward the seat member, and a connecting portion that is disposed between the valve body and the second stem and connects the valve body and the second stem, A connecting portion holding portion formed on the other end side, the connecting portion holding portion holding the connecting portion, wherein the connecting portion has a space in which one end portion of the second stem is inserted. The second stem has a cam portion formed at the one end portion, the cam portion being eccentric with respect to the axis, the cam portion being the valve element; A pressing portion capable of pressing at least a part of the inner surface of the recess so as to tilt the valve body by rotating the second stem about the axis while the non-penetrating portion is opposed to the sheet member. In the valve device having the above, the connection portion may be pressed from the pressing portion. Together to transmit a force to the valve body to tilt the valve body, characterized in that it is configured to rotate relatively with respect to the valve body.

  According to the valve device configured as described above, the valve body is rotated around the axis by the first stem, so that the communication passage of the valve body and the main passage of the housing communicate with each other, and the non-penetrating portion of the valve body (of the communication passage). The portion in which the opening is not formed) and the annular sheet member (opening of the main passage) can be switched to a state facing each other. Then, by rotating the second stem around the axis while the non-penetrating portion of the valve body faces the seat member, the pressing portion presses the inner surface of the concave portion of the connecting portion, and this pressing force is transmitted to the valve body. The valve body tilts toward the seat member. As a result, the non-penetrating portion of the valve body and the seat member are in close contact with each other, and communication between the communication passage and the main passage is blocked.

  And since a connection part is comprised so that it may rotate relatively with respect to a valve body, even if a valve body tilts, a 2nd stem (cam part) and connection part have sufficient contact area. Can be maintained. As a result, since it is suppressed that a large force is locally applied to the pressing portion of the cam portion, it is possible to suppress wear of the pressing portion and suppress a decrease in pressing force.

  As one aspect of the present invention, the connection portion holding portion has an inner surface that defines a space into which the connection portion is inserted, and the connection portion slides with respect to the inner surface of the connection portion holding portion. It is preferable that the valve body is rotatable relative to the valve body. If it does in this way, a connection part can be slid with respect to the inner surface of a connection part holding part, and can be rotated with respect to a valve body.

  As another aspect of the present invention, an inner surface of the connection portion holding portion includes a peripheral surface and a bottom surface, and the connection portion is a bottom facing surface facing the bottom surface, and the peripheral surface located in the tilting direction of the valve body. A first circumferentially opposed surface that faces the circumferential surface, a second circumferentially opposed surface that faces the circumferential surface located in a direction opposite to the tilting direction of the valve body, and a first convex portion that protrudes from the bottom facing surface A first convex portion slidable with the bottom surface, and a second convex portion protruding from the first circumferentially opposed surface, the second convex portion being slidable with the circumferential surface located in the tilting direction of the valve body A convex portion, and a third convex portion protruding from the second circumferentially opposed surface, and having a third convex portion slidable with the circumferential surface located in a direction opposite to the tilting direction of the valve body. Is preferred. If it does in this way, a connection part can rotate smoothly, being supported by the 1st convex part, the 2nd convex part, and the 3rd convex part to a valve element.

  As another aspect of the present invention, it is preferable that the first convex portion, the second convex portion, and the third convex portion are each formed such that the apex portion has an arc shape. If it does in this way, the 1st convex part, the 2nd convex part, and the 3rd convex part are the bottom of the connecting part holding part, the peripheral surface of the connecting part holding part located in the tilting direction of the valve body, and the tilting of the valve body, respectively. It becomes easy to slide with the peripheral surface of the connection part holding part located in the direction opposite to the direction. As a result, the connecting portion can be rotated more smoothly while being supported by the first convex portion, the first convex portion, and the second convex portion with respect to the valve body.

  As described above, according to the valve device of the present invention, it is possible to achieve an excellent effect that the wear of the pressing portion of the cam portion of the second stem can be suppressed and the decrease in the pressing force can be suppressed.

It is a longitudinal cross-sectional view of the valve apparatus which concerns on one Embodiment of this invention, Comprising: It is a longitudinal cross-sectional view of the state which made the non-penetrating part of the valve body face the sheet | seat member in non-contact. It is the longitudinal cross-sectional view which expanded the principal part of the valve apparatus which concerns on the same embodiment, Comprising: It is a longitudinal cross-sectional view of the state which made the non-penetrating part of the valve body face the sheet | seat member non-contactingly. It is the longitudinal cross-sectional view which expanded the principal part of the valve apparatus which concerns on the same embodiment, Comprising: It is the longitudinal cross-sectional view of the state which made the valve body tilt by contacting the non-penetrating part of a valve body with a sheet | seat member. It is the A section enlarged view of FIG. It is the longitudinal cross-sectional view which expanded the principal part of the valve apparatus which concerns on another embodiment of this invention, Comprising: It is a longitudinal cross-sectional view of the state which made the non-penetrating part of the valve body face the sheet | seat member non-contactingly. It is a longitudinal cross-sectional view of the conventional valve apparatus. It is the B section enlarged view of FIG.

  Hereinafter, a valve device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  The valve device according to the present embodiment is a two-way valve that is disposed on a flow path through which a flow object is circulated and switches between blocking and opening of the flow path. As shown in FIGS. 1 and 2, the valve device is provided so as to be rotatable around a predetermined axis L, and is formed with a communication passage R <b> 1 penetrating through a virtual plane orthogonal to or substantially orthogonal to the axis L. The valve body 2 and the valve body housing chamber VR for housing the valve body 2 are formed, and two main passages R2, which can communicate with each other via the communication passage R1 of the valve body 2 in the valve body housing chamber VR. The housing 3 in which R3 is formed, the annular seat member 4 disposed around the opening of one main passage R2 that opens toward the valve body accommodating chamber VR in the housing 3, and the housing 3 so as to pass through the axis L. The first stem 5 that rotates the valve body 2 around the axis L on one end side of the valve body 2 in the direction of the axis L, and the housing 3 on the opposite side of the first stem 5 so as to pass through the axis L The valve body at the other end side of the valve body 2 in the direction of the axis L The includes a second stem 6 to tilt toward the sheet member 4 is disposed between the valve body 2 and the second stem 6, and a connecting portion 7 for connecting the valve body 2 and a second stem 6. The valve body 2 is a connection portion holding portion 22 formed on the other end side, and has a connection portion holding portion 22 in which the connection portion 7 is held. The connection portion 7 has an end portion of the second stem 6. The second stem 6 is a cam portion 61 formed at one end, and has a cam portion 61 that is eccentric with respect to the axis L, and has a concave portion 710 having an inner surface 71 that defines a space to be inserted. The cam portion 61 rotates at least the inner surface 71 of the recess 710 so as to tilt the valve body 2 by rotating the second stem 6 around the axis L with the non-penetrating portion of the valve body 2 facing the seat member 4. It has the press part 61a which can press a part. In the valve device 1, the connecting portion 7 is configured to transmit the pressing force from the pressing portion 61 a to the valve body 2 to tilt the valve body 2 and to rotate relative to the valve body 2. Yes.

  In the valve device 1 according to the present embodiment, the valve body 2 is rotated around the axis L by the first stem 5 so that the communication path R1 of the valve body 2 and the main paths R2 and R3 of the housing 3 are in communication (flow). A state in which the object is circulated) and a state in which the non-penetrating portion of the valve body 2 (the portion where the opening of the communication passage R1 is not formed) and the annular seat member 4 (the opening of the main passage R2) are opposed to each other. It is configured to be able to. Further, the valve device 1 rotates the second stem 6 around the axis L with the non-penetrating portion of the valve body 2 facing the seat member 4, so that the pressing portion 61 a of the cam portion 61 is a concave portion of the connecting portion 7. The 710 inner surface 71 is pressed, and this pressing force is transmitted to the valve body 2 so that the valve body 2 tilts toward the seat member 4. As a result, the non-penetrating portion of the valve body 2 and the seat member 4 are in close contact with each other, and the communication between the communication passage R1 and the main passages R2 and R3 is blocked.

  The valve body 2 according to the present embodiment is formed in a substantially spherical shape, and is formed with a communication path R1 configured by a straight round hole that passes through the approximate center of the valve body 2. Further, the valve body 2 is formed with a first stem insertion portion 21 for inserting the first stem 5 on one end side in the axis L direction, and on the opposite side (the other end side) from the first stem insertion portion 21. ) Is formed with a connecting portion holding portion 22 for holding the connecting portion 7.

  The first stem insertion portion 21 is a non-penetrating recess formed in a square hole shape, and has a recess into which the first stem 5 is inserted.

  Similar to the first stem insertion portion 21, the connection portion holding portion 22 is a non-penetrating recess formed in a square hole shape, and has a recess having an inner surface 220 that defines a space into which the connection portion 7 is inserted. doing. The inner surface 220 of the connection holding part 22 includes peripheral surfaces 221 and 222 and a bottom surface 223.

  Of the peripheral surface of the connection portion holding portion 22, the connection portion 7 is in contact with a surface (hereinafter referred to as a first pressed surface) 221 located in a direction in which the valve body 2 tilts. As a result, the pressing force from the pressing portion 61 a of the cam portion 61 of the second stem 6 to the connecting portion 7 is transmitted from the connecting portion 7 to the first pressed surface 221. As a result, the valve body 2 is configured to tilt.

  In the present embodiment, the valve body 2 is forcibly displaced from the state in which the valve body 2 is tilted to the seat member 4 side (the state in which the valve body 2 is in close contact with the sheet member 4) by the pressing by the pressing portion 61a (the valve body). 2 is separated from the seat member 4), the peripheral surface of the connecting portion holding portion 22 also includes a surface 222 (hereinafter referred to as a second pressed surface) located on the opposite side to the direction in which the valve body 2 tilts. ing.

  The housing 3 according to the present embodiment includes a main frame 30 that defines the valve body accommodating chamber VR and the other main passage R3, and a subframe 31 that defines the one main passage R2.

  The main frame 30 is connected to the main body 300 that defines the valve body housing chamber VR that houses the valve body 2, the main flange 301 that is connected to one end of the main body 300, and the other end of the main body 300. A main passage forming portion 302 that defines the other main passage R3, a first stem insertion portion 303 for inserting the first stem 5, and a second stem insertion portion 304 for inserting the second stem 6. It is configured.

  The main body 300 is formed in a cylindrical shape with both ends opened, and defines (forms) a valve body accommodation chamber VR that can accommodate the valve body 2 in a non-contact state. The main flange portion 301 is formed in an annular shape, is concentric with the main body portion 300, and has one surface connected to one end of the main body portion 300. In the main flange portion 301 according to the present embodiment, an annular recess 305 into which a sheet member fixing means 32 to be described later can be fitted is formed concentrically with the opening on the surface facing the subframe 31 side.

  The main passage forming portion 302 is formed in an annular shape and defines the other main passage R3. The main passage forming portion 302 has one end connected to the other end of the main body 300 so that the main passage R3 is concentric with the valve body housing chamber VR of the main body 300. In the present embodiment, the main passage forming portion 302 is provided with a flange portion 302a at the other end to connect a pipe.

  The first stem insertion part 303 is connected to a part of the outer periphery of the main body part 300, and a first through hole H <b> 1 that is substantially concentric with the axis L is formed.

  In the valve device 1 according to the present embodiment, a first stem fixing member 33 for fixing the first stem 5 to the first through hole H1 of the first stem insertion portion 303 is inserted. In the valve device 1 according to the present embodiment, a cylindrical gasket G is fitted into the outwardly opening portion of the first stem fixing member 33, and the first stem 5 is rotated around the axis L by the gasket G. The periphery of the first stem 5 is sealed while allowing

  The second stem insertion portion 304 is provided on the opposite side of the first stem insertion portion 303 with the valve body accommodating chamber VR (main body portion 300) interposed therebetween. The second stem insertion portion 304 is provided with a second through hole H2 that penetrates substantially concentrically with the axis L of the valve body 2. In the valve device 1 according to the present embodiment, the second stem fixing member 35 for fixing the second stem 6 to the second through hole H2 of the second stem insertion portion 304 is inserted.

  In the valve device 1 according to the present embodiment, packings C and C are provided on both sides in the axial direction of the large-diameter portion 60 of the second stem 6, and the second stem fixing member 35 is opened outward. A cylindrical gasket G is fitted therein, and the periphery of the second stem 6 is sealed by the packings C and C and the gasket G while allowing the second stem 6 to rotate around the axis L.

  The sub frame 31 is attached to the main frame 30, and includes a connecting flange portion 310 for connecting to the main body portion 300, a cylindrical portion 311 having one end connected to the connecting flange portion 310, and a cylindrical portion. 311, and a pipe connecting flange portion 312 that is connected to the other end of 311.

  The connecting flange portion 310 is formed in an annular shape, and is screwed to the main flange portion 301 so as to be concentric with the main body portion 300 and the main flange portion 301. The cylindrical portion 311 is provided so as to be concentric with the connecting flange portion 310. The pipe connecting flange portion 312 is formed in an annular shape, and one surface side is fixed to the tubular portion 311 so as to be concentric with the tubular portion 311.

  The seat member 4 is formed in an annular shape that can be inserted concentrically with respect to the seat member accommodating portion 314 formed in the subframe 31, and an annular shape that can contact the periphery of the communication path R <b> 1 of the valve body 2 at one end. A seal portion 40 is projected.

  In the valve device 1 according to the present embodiment, the seat member 4 is accommodated in the seat member accommodating portion 314 so as to be movable in the hole center direction, and the urging means (with the seat member 4 in the seat member accommodating portion 314 ( In this embodiment, a disc spring) 315 is accommodated.

  And the sheet | seat member 4 which concerns on this embodiment is formed so that the seal part 40 may protrude in the valve body storage chamber VR side. Thereby, when the valve body 2 tilts toward the seat member 4 side, the seal portion 40 can come into contact with the outer peripheral surface of the valve body 2 over the entire length (entire circumference). The material of the seat member 4 is selected according to the properties of the distribution object and the usage environment of the valve device 1 (in consideration of heat resistance, chemical resistance, etc.), but the tightness with the outer peripheral surface of the valve body 2 Natural rubber, synthetic rubber (nitrile rubber, silicone rubber, acrylic rubber, styrene butadiene rubber, synthetic rubber such as fluorine rubber, ethylene propylene rubber), elastic materials such as tetrafluoroethylene rubber resin, etc. Preferably it is molded.

  The first stem 5 is inserted into the first through hole H <b> 1 of the first stem insertion portion 303 of the housing 3, and one end side is located outside the housing 3, while the other end side is located inside the housing 3. Yes. A handle or an actuator (not shown) is attached to one end of the first stem 5, and the first stem 5 rotates about the axis L by operating the handle or operating the actuator.

  The first stem 5 is a torque transmission portion 51 that is inserted into the first stem insertion portion 21 of the valve body 2 in the valve body housing chamber VR at the other end, and extends in a direction orthogonal to the axis L, and the first stem 5 A torque transmission portion 51 that can be brought into surface contact with the inner surface of the insertion portion 21 is provided. The torque transmission part 51 transmits the rotational force (rotational torque) around the axis L of the first stem 5 to the inner surface of the first stem insertion part 21 to rotate the valve body 2 around the axis L, and the communication path R1. It is formed to allow the valve body 2 to tilt in the direction intersecting the hole center and the axis L.

  The second stem 6 is inserted into the second through hole H <b> 2 of the second stem insertion portion 304 of the housing 3, and one end side is located inside the housing 3, and the other end side is located outside the housing 3. Yes. The second stem 6 has a handle and an actuator (not shown) attached to the other end, and rotates around the axis L by the operation of the handle and the operation of the actuator.

  As shown in FIG. 2, the second stem 6 has a columnar cam portion 61 at one end, and a part of the peripheral surface of the columnar cam portion 61 forms a pressing portion 61a. The cam portion 61 is inserted into the concave portion 710 of the connection portion 7. In the present embodiment, the pressing portion 61a of the cam portion 61 is connected to the connecting portion 7 by rotating the second stem 6 in one direction around the axis L with the non-penetrating portion of the valve body 2 facing the seat member 4. It is comprised so that the recessed part 710 inner surface 71 may be pressed. On the other hand, by rotating the first stem 6 in the other direction around the axis L, the pressing by the pressing portion 61a is released, and the valve body 2 is configured to be allowed to rotate around the axis L.

  The connection portion 7 is disposed between the valve body 2 and the second stem 6, more specifically, between the connection portion holding portion 22 and the second stem 6, and the valve body 2 and the second stem 6 are connected to each other. Configured to connect.

  The connection portion 7 according to the present embodiment has a concave portion 710 having a square hole shape and a bottomed cylindrical shape, and the cam portion 61 of the second stem 6 is inserted into the concave portion 710. Further, the portion of the connection portion 7 opposite to the side having the recess 710 is held by the connection portion holding portion 22. Specifically, a portion of the connection portion 7 opposite to the side having the recess 710 is inserted into the recess of the connection portion holding portion 22 having the inner surface 220. The connecting portion 7 can rotate relative to the valve body 2 by sliding with respect to the inner surface 220 of the connecting portion holding portion 22.

  In the connection portion 7 according to the present embodiment, the outer surface 73 has at least a bottom facing surface 731 facing the bottom surface 223 of the connection portion holding portion 22 and a peripheral surface of the connection portion holding portion 22 positioned in the tilting direction of the valve body 2 ( The first circumferentially opposed surface 732 that faces the first pressed surface 221 and the circumferential surface (second pressed surface) 222 of the connecting portion holding portion 22 that is located in the direction opposite to the tilting direction of the valve body 2. And a second circumferentially opposed surface 733. The connecting portion 7 is a first convex portion 734 that protrudes downward from the bottom facing surface 731 in the axis L direction, and a first convex portion 734 that can slide on the bottom surface 223 of the connecting portion holding portion 22, A second convex portion 735 that protrudes from the circumferentially opposed surface 732 in a direction substantially perpendicular to the direction of the axis L, and is slidable from the first pressed surface 221 and from the second circumferentially opposed surface 733. The third convex portion 736 protrudes in a direction substantially orthogonal to the axis L direction, and includes a second pressed surface 222 and a slidable third convex portion 736.

  The 1st convex part 734 which concerns on this embodiment is formed so that a vertex part may make circular arc shape. Specifically, the first convex portion 734 extends on the bottom facing surface 731 in the axial direction of the communication path R1 (the communication path R1 in a state where the non-penetrating portion of the valve body 2 faces the seat member 4). It is comprised as a semicylindrical convex part arrange | positioned in. Accordingly, the first convex portion 734 is in contact with the bottom surface 223 of the connection portion holding portion 22 at the apex portion. Accordingly, the first convex portion 734 slides on the bottom surface 223 of the connection portion holding portion 22 when the connection portion 7 rotates with respect to the valve body 2.

  The 2nd convex part 735 which concerns on this embodiment is formed so that a vertex part may make circular arc shape. Specifically, the second convex portion 735 extends on the first circumferential facing surface 732 in the axial direction of the communication path R1 (the communication path R1 in a state where the non-penetrating portion of the valve body 2 faces the seat member 4). It is comprised as a semi-cylindrical convex part arrange | positioned so. Accordingly, the second convex portion 735 is in contact with the first pressed surface 221 of the connection portion holding portion 22 at the apex portion. Accordingly, the second convex portion 735 slides on the first pressed surface 221 when the connecting portion 7 rotates with respect to the valve body 2.

  The third convex portion 736 according to the present embodiment is formed so that the apex portion has an arc shape like the second convex portion 735. Specifically, the third convex portion 736 extends through the second circumferentially opposed surface 733 in the axial direction of the communication path R1 (the communication path R1 in a state where the non-penetrating portion of the valve body 2 faces the seat member 4). It is comprised as a semi-cylindrical convex part arrange | positioned so. Accordingly, the third convex portion 736 is in contact with the second pressed surface 222 of the connection portion holding portion 22 at the apex portion. Accordingly, the third convex portion 736 slides on the second pressed surface 222 when the connecting portion 7 rotates with respect to the valve body 2.

  Thus, the connecting portion 7 has three convex portions on the outer surface 73, specifically, the first convex portion 734 and the first convex portion on the bottom facing surface 731, the first circumferential facing surface 732, and the second circumferential facing surface 733, respectively. Two convex portions 735 and a third convex portion 736 are provided. Thereby, the connection part 7 is rotatable with respect to the valve body 2 while being supported by the first convex part 734, the second convex part 735 and the third convex part 736. The connection portion 7 according to the present embodiment is rotatable along a substantially arcuate locus passing through the apex portions of the first convex portion 734, the second convex portion 735, and the third convex portion 736 with respect to the valve body 2. ing. That is, the connecting portion 7 includes a first convex portion 734, a second convex portion 735, and a third convex portion 736 that slide on the bottom surface 223, the first pressed surface 221 and the second pressed surface 222 of the connecting portion holding portion 22. By moving, it can rotate with respect to the valve body 2. Specifically, when the valve body 2 tilts toward the seat member 4, the connection portion 7 tilts the first convex portion 734 on the bottom surface 223 of the connection portion holding portion 22 as shown in FIGS. 3 and 4. The second convex portion 735 slides upward on the first pressed surface 221 of the connection portion holding portion 22 while sliding in the direction, and the third convex portion 736 is the second pressed surface of the connection portion holding portion 22. By sliding downward on 22, the valve body 2 is rotated. Accordingly, the connection portion 7 rotates relative to the valve body 2 in the direction opposite to the tilting direction of the valve body 2. That is, the rotation axis of the valve body 2 and the rotation axis of the connection portion 7 are configured to be parallel to each other. As a result, even if the valve body 2 tilts, the connecting portion 7 does not tilt, and the contact state with the second stem 6 (cam portion 61) is sufficiently maintained. That is, when the valve body 2 tilts, the connecting portion 7 rotates so as to follow the second stem 6 with respect to the valve body 2.

  As described above, the second convex portion 735 has a function of assisting the rotation of the connecting portion 7 with respect to the valve body 2 by sliding on the first pressed surface 221 when the valve body 2 tilts. In addition, it also has a function of transmitting the pressing force from the pressing portion 61a to the valve body 2 and tilting the valve body 2. That is, the second convex portion 735 also has a function of transmitting the pressing force of the pressing portion 61 a to the valve body 2. Accordingly, the pressing force of the pressing portion 61 a is transmitted to the connecting portion 7 by rotating the second stem 6 around the axis L in one direction with the non-penetrating portion of the valve body 2 facing the seat member 4. Further, the second convex portion 735 of the connection portion 7 is transmitted to the valve body 2 (first pressed surface 221).

  The valve device 1 according to the present embodiment is configured as described above. Next, the operation of the valve device 1 according to the present embodiment will be described. In the following, description will be made on the assumption that the distribution object is distributed from the one main passage R2 formed in the subframe 31 toward the other main passage R3 formed in the main frame 30.

  First, when the distribution object is distributed, one end opening of the communication path R1 of the valve body 2 is opposed to one main path R2. That is, the opening of the communication path R1 is directed upstream in the flow direction of the flow target. In this state, the two main passages R2, R3 and the communication passage R1 of the valve body 2 are concentric or substantially concentric, and the two main passages R2, R3 are in communication with each other via the communication passage R1 of the valve body 2. Become. Further, the valve body 2 is maintained in a non-contact state with respect to the seat member 4.

  When the flow object is circulated from one main passage R2 side (upstream main passage R2), the flow object passes through the communication passage R1 of the valve body 2 and the other main passage R3 side (downstream side). It flows to the main passage R3).

  When the main passages R2 and R3 are blocked from a state in which the flow of the flow object is permitted, only the first stem 5 is rotated while the second stem 6 is maintained as it is. If it does so, the rotational force of the 1st stem 5 will be transmitted to the valve body 2, and this valve body 2 will rotate 90 degrees.

  Thus, when the valve body 2 is rotated without rotating the second stem 6, the pressing portion 61 a of the cam portion 61 of the second stem 6 does not press the concave portion 710 inner surface 71 of the connection portion 7 (valve body). 2) (a state in which a pressing force that tilts 2 is not applied) is maintained. The valve body 2 rotates around the axis L while being maintained in a non-contact state with respect to the seat member 4, and the non-penetrating portion of the valve body 2 is in relation to one main passage R2 (seat member 4). In this state, the first stem 5 is allowed to tilt toward the sheet member 4 with the torque transmission portion 51 of the first stem 5 as a fulcrum.

  Then, when the second stem 6 is rotated without rotating the first stem 5, the pressing portion 61a presses a part of the inner surface 71 of the connection portion 7 (concave portion 710) located in the tilting direction of the valve body 2, This pressing force is transmitted to the first pressed surface 221 of the connection portion holding portion 22 through the second convex portion 735 of the connection portion 7. As a result, the valve body 2 is pressed toward the seat member 4, and the valve body 2 tends to tilt by the pressing force. At this time, the valve body 2 is tilted with the tip of the first stem 5 (support point supporting the valve body 2) as a tilting fulcrum, and the non-penetrating portion of the valve body 2 is in a state where the valve body 2 is tilted by a predetermined amount. As a result of pressure contact with the seat member 4 and sealing between the valve body 2 and the housing 3, one main passage R2 (between the two main passages R2 and R3) is blocked and the flow of the flow object is blocked. .

  When the main passage R2 is blocked, the valve body 2 is inclined toward the seat member 4, but the connecting portion 7 has three convex portions protruding from the outer surface 73, that is, a first convex portion 734 and a second convex portion. 735 and the third convex portion 736 rotate in the opposite direction to the valve body 2. Therefore, the contact state between the connecting portion 7 and the second stem 6 (cam portion 61) is sufficiently maintained, and a large force is prevented from being locally applied to the cam portion 61 of the second stem 6.

  In order to switch from this state to the state in which the circulation object is circulated, the second stem 6 is rotated in the reverse direction (rotated in the opposite direction to the case where the valve body 2 is displaced toward the seat member 4). The contact position of the pressing portion 61a with respect to the insertion portion 304 is changed, and the tilted valve body 2 is raised and separated from the seat member 4.

  As a result, the valve body 2 returns to the original position, and the valve body 2 and the seat member 4 return to a non-contact state (substantially constant interval). And if the 1st stem 5 is reversely rotated without rotating the 2nd stem 6 (when the non-penetrating part of the valve body 2 is made to oppose the sheet member 4), the valve body 2 will become a sheet member. 4, the two main passages R2 and R3 communicate with each other via the communication passage R1 of the valve body 2 and return to a state in which the circulation of the circulation object is permitted.

  As described above, the valve device 1 according to the present embodiment is provided so as to be rotatable around a predetermined axis L, and is formed with a communication path R1 penetrating through a virtual plane orthogonal or substantially orthogonal to the axis L. The valve body 2 and the valve body housing chamber VR for housing the valve body 2 are formed, and two main passages R2, which can communicate with each other via the communication passage R1 of the valve body 2 in the valve body housing chamber VR. The housing 3 in which R3 is formed, the annular seat member 4 disposed around the opening of one main passage R2 that opens toward the valve body accommodating chamber VR in the housing 3, and the housing 3 so as to pass through the axis L. The first stem 5 that rotates the valve body 2 around the axis L on one end side of the valve body 2 in the direction of the axis L, and the housing 3 on the opposite side of the first stem 5 so as to pass through the axis L At the other end of the valve body 2 in the direction of the axis L A second stem 6 that tilts the body 2 toward the seat member 4, and a connection portion 7 that is disposed between the valve body 2 and the second stem 6 and connects the valve body 2 and the second stem 6. . The valve body 2 is a connection portion holding portion 22 formed on the other end side, and has a connection portion holding portion 22 where the connection portion 7 is held. The connection portion 7 is one end of the second stem 6. The second stem 6 is a cam portion 61 formed at one end portion, and has a cam portion 61 that is eccentric with respect to the axis L. The cam portion 61 rotates the second stem 6 around the axis L in a state where the non-penetrating portion of the valve body 2 faces the seat member 4, so that the inner surface 71 of the recess 710 tilts the valve body 2. There is a pressing portion 61a that can press at least a part thereof. In the valve device 1, the connecting portion 7 is configured to transmit the pressing force from the pressing portion 61 a to the valve body 2 to tilt the valve body 2 and to rotate relative to the valve body 2. Has been.

  According to the valve device 1, the valve body 2 is rotated around the axis L by the first stem 5, so that the communication path R 1 of the valve body 2 and the main passages R 2 and R 3 of the housing 3 communicate with each other. The two non-penetrating portions (portions where the opening of the communication passage R1 is not formed) and the annular sheet member 4 (opening of the main passage R2) can be switched to a state facing each other. Then, by rotating the second stem 6 around the axis L with the non-penetrating portion of the valve body 2 facing the seat member 4, the pressing portion 61a presses the inner surface 71 of the concave portion 710 of the connecting portion 7, The pressing force is transmitted to the valve body 2 and the valve body 2 tilts toward the seat member 4. As a result, the non-penetrating portion of the valve body 2 and the seat member 4 are in close contact with each other, and communication between the communication passage R1 and the main passages R2 and R3 is blocked.

  And since the connection part 7 is comprised so that it may rotate relatively with respect to the valve body 2, even if the valve body 2 tilts, the 2nd stem 6 (cam part 61) and the connection part 7 are the same. Sufficient contact area can be maintained. As a result, since it is suppressed that a big force is locally applied to the pressing part 61a, wear of the pressing part 61a can be suppressed and a decrease in pressing force can be suppressed. Conventionally, as a countermeasure against a large force locally applied to the pressing portion 61a due to the extremely small contact area between the second stem 6 (cam portion 61) and the connecting portion 7, the second stem 6 ( Although the chamfering of the contact portion between the cam portion 61) and the connection portion 7 may be performed, in the valve device 1 according to the present embodiment, it is possible to suppress a large force from being locally applied to the pressing portion 61a. There is no need to chamfer the contact area.

  In the present embodiment, the connection portion holding portion 22 has an inner surface 220 that defines a space into which the connection portion 7 is inserted, and the connection portion 7 slides with respect to the inner surface 220 of the connection portion holding portion 22. Accordingly, the valve body 2 can be rotated relative to the valve body 2. If it does in this way, the connection part 7 can be slid with respect to the inner surface 220 of the connection part holding | maintenance part 22, and can be rotated with respect to the valve body 2. FIG.

  In the present embodiment, the inner surface 220 of the connection portion holding portion 22 includes peripheral surfaces 221 and 222 and a bottom surface 223, and the connection portion 7 includes a bottom facing surface 731 that faces the bottom surface 223 and the tilting direction of the valve body 2. The first circumferentially opposed surface 732 that faces the circumferential surface (first pressed surface) 221 located at the center and the circumferential surface (second pressed surface) 222 that faces in the direction opposite to the tilting direction of the valve body 2. A first convex portion 734 protruding from the second peripheral facing surface 733 and a bottom opposing surface 731, a first convex portion 734 slidable on the bottom surface 223, and a second convex protruding from the first peripheral opposing surface 732 A second convex portion 735 slidable with a peripheral surface (first pressing surface) 221 located in the tilt direction of the valve body 2, and a third convex portion 736 protruding from the second peripheral facing surface 733. And a circumferential surface (second pressed surface) 2 located in a direction opposite to the tilting direction of the valve body 2 It may have the 2 and slidable third protrusion 736. Thereby, the connection part 7 can be smoothly rotated with respect to the valve body 2 while being supported by the first convex part 734, the second convex part 735 and the third convex part 736.

  Moreover, in this embodiment, the 1st convex part 734, the 2nd convex part 735, and the 3rd convex part 736 can each be formed so that a vertex part may make circular arc shape. Accordingly, the first convex portion 734, the second convex portion 735, and the third convex portion 736 are easy to slide on the bottom surface 223, the first pressed surface 221 and the second pressed surface 222 of the connection portion holding portion 22, respectively. Become. As a result, the connection part 7 can be rotated more smoothly while being supported by the first convex part 734, the first convex part 735 and the second convex part 736 with respect to the valve body 2.

  The valve device of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In the above-described embodiment, the seat member 4 is provided so as to be movable toward the hole center of the main passage R2, and the urging means 315 for urging the sheet member 4 toward the valve body accommodating chamber VR (valve body 2) is provided. However, it is not limited to this, For example, you may make it fix the sheet | seat member 4 in a fixed position.

  In the above embodiment, on the premise that the flow target is distributed from one main passage R2 side, one opening of the communication passage R1 of the valve body 2 is set to the one main passage R2 side in a state in which the flow target is distributed. However, the present invention is not limited to this. For example, the distribution object may be distributed from the other main passage R3 side. In this case, one opening of the communication passage R1 of the valve body 2 may be directed toward the other main passage R3 in a state in which the flow target is circulated.

  In the above embodiment, the first convex portion 734, the second convex portion 735, and the third convex portion 736 of the connecting portion 7 protrude from the bottom facing surface 731, the first circumferential facing surface 732, and the second circumferential facing surface 733, and Although these surfaces 731, 732, and 733 are configured as semi-cylindrical convex portions arranged so as to extend, the present invention is not limited to this. For example, as shown in FIG. 5, the first convex portion 734a, the second convex portion 735a, and the third convex portion 736a are continuous without a step, and the outer surface 73a of the connecting portion 7 has an elliptical shape (or an arc shape) in sectional view. You may make it. That is, the connecting portion 7 is configured to transmit the pressing force from the pressing portion 61 a to the valve body 2 to tilt the valve body 2 and to rotate relative to the valve body 2. For example, the shape of the outer surface 73 of the connecting portion 7 may be any shape.

  In the above embodiment, the concave portion of the connection portion holding portion 22 is formed in a square hole shape, but is not limited thereto. For example, the concave portion may be spherical, substantially spherical, or hemispherical, and the outer surface 73 of the connecting portion 7 may be spherical, substantially spherical, or hemispherical according to the shape of the concave portion of the connecting portion holding portion 22. In this case, the connecting portion 7 can rotate relative to the valve body 2 by sliding with respect to the inner surface of the connecting portion holding portion 22.

  In the above embodiment, the cam portion 541 has a columnar shape, but is not limited thereto. That is, in the above embodiment, the peripheral surface of the inner surface 71 of the concave portion 710 of the connection portion 7 extends so as to be substantially parallel to the axis L. For example, when the peripheral surface is inclined or bent, The outer periphery of the cam portion 542 may also have a shape along the peripheral surface of the concave portion 710 of the connection portion 7.

  DESCRIPTION OF SYMBOLS 1 ... Valve apparatus, 2 ... Valve body, 3 ... Housing, 4 ... Seat member, 5 ... First stem, 6 ... Second stem, 7 ... Connection part, 21 ... First stem insertion part, 22 ... Connection part holding part , 30 ... main frame, 31 ... subframe, 40 ... seal part, 61 ... cam part, 61a ... pressing part, 71 ... inner surface of connecting part, 73 ... outer surface of connecting part, 221 ... first pressed surface, 222 ... 2nd pressed surface, 223 ... bottom surface of connecting portion holding portion, 303 ... first stem inserting portion, 304 ... second stem inserting portion, 710 ... recessed portion of connecting portion, 731 ... bottom facing surface of connecting portion, 732 ... connection First circumferentially facing surface of the part, 733 ... second circumferentially facing surface of the connecting part, 734 ... first convex part of the connecting part, 735 ... second convex part of the connecting part, 736 ... third convex part of the connecting part, C ... packing, G ... gasket, H1 ... first through hole, H2 ... second through hole, L ... axis, R1 ... Passage, R2, R3 ... the main passage, VR ... valve chamber

Claims (4)

  A valve body that is provided so as to be rotatable around a predetermined axis and that has a communication passage that passes through a virtual plane that is orthogonal or substantially orthogonal to the axis is formed, and a valve body housing chamber that houses the valve body is formed. And a housing in which at least two main passages that can communicate with each other via a communication passage of the valve body in the valve body housing chamber are formed, and at least one that opens toward the valve body housing chamber in the housing. An annular seat member disposed around the opening of the two main passages, and the housing is inserted through the housing so as to pass through the axis, and the valve body is rotated around the axis on one end side of the valve body in the axial direction. The stem is inserted into the housing on the side opposite to the first stem so as to pass through the axis, and the valve body is tilted toward the seat member on the other end side of the valve body in the axial direction. A second stem that is disposed between the valve body and the second stem, and a connecting portion that connects the valve body and the second stem, wherein the valve body is formed on the other end side. A connecting portion holding portion that holds the connecting portion, and the connecting portion has a recess having an inner surface that defines a space into which one end of the second stem is inserted. The second stem is a cam portion formed at the one end portion, and has a cam portion eccentric with respect to the axis, and the cam portion has a non-penetrating portion of the valve body as the seat. In the valve device having a pressing portion capable of pressing at least a part of the inner surface of the recess so as to tilt the valve body by rotating the second stem around the axis while facing the member. The part transmits the pressing force from the pressing part to the valve body and The valve body with tilting the valve device, characterized in that it is configured to rotate relatively with respect to the valve body.   The connection portion holding portion has an inner surface that defines a space into which the connection portion is inserted, and the connection portion is relative to the valve body by sliding relative to the inner surface of the connection portion holding portion. The valve device according to claim 1, wherein the valve device is pivotable.   The inner surface of the connecting portion holding portion includes a peripheral surface and a bottom surface, and the connecting portion has a bottom facing surface that faces the bottom surface and a first circumferential facing that faces the circumferential surface positioned in the tilting direction of the valve body. A surface, a second circumferentially opposed surface facing the circumferential surface located in a direction opposite to the tilting direction of the valve body, and a first convex portion projecting from the bottom opposed surface, and slidable on the bottom surface A first convex portion, a second convex portion protruding from the first circumferential facing surface, the second convex portion slidable with the circumferential surface located in the tilting direction of the valve body, and the second 3. A third convex portion protruding from a circumferentially opposed surface, wherein the third convex portion has a slidable third convex portion and the circumferential surface located in a direction opposite to the tilting direction of the valve body. The valve device described in 1.   4. The valve device according to claim 3, wherein each of the first convex portion, the second convex portion, and the third convex portion is formed such that a vertex portion has an arc shape.

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